As, "[(p \u2192 q) \u2227 (\u00acp \u2192 r)] \\to (q \u2228 r)" is a Tautology (always true) ;
Thus; the implication holds.
"\\therefore (p \u2192 q) \u2227 (\u00acp \u2192 r) \u21d2 (q \u2228 r)"
It is valid as the condtional is a Tautolgy; hece the Implication holds.
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